<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>My Cool Site</title>
</head>

<body>
    <div style="
        display: flex;
        align-items: center;
        justify-content: center;
        height: 500px;
      ">
        Welcome to My Cool Site &trade;
    </div>
</body>

</html>